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Let vec a = 2i+j-2k and vec b = i+j. If...

Let `vec a = 2i+j-2k` and ` vec b = i+j`. If `vec c` is a vector such that ` vec a . vec c = |vec c|, |vec c - vec a| = 2 sqrt2` and the angle between `(vec a xx vec b )` and `vec c ` is `30^(o)`, then `|(vec a xx vec b) xx vec c| =`

A

`2/3`

B

`3/2`

C

2

D

3

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The correct Answer is:
B
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